| Acronym | Meaning |
 | SCT | Scattered Sky (METAR Code) |
| APEDS | AMSAA Performance Estimates Data System |
| IMR | Inzhenernaya Mashina Razgrazhdeniya (Russian ?????????? ?????? ???????????? |
| IHH | Idiopathic Hypogonadotropic Hypogonadism |
| ATWA | Air |
| CNI | Communications |
| PS | Picosiemens |
| PRN | Pro Re Nata (Latin |
| IMT | Integrated Management Tool |
| AN | Attonewton |
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